Crossing Angles for 2 IRsMany MDI and Beam Delivery topics are relevant for choosing the crossing angles. A matrix/summary of the relevant issues is needed to assist either the "global design team" or the detector collaborations in selecting the IR crossing angles.

Physics Options and Detector Concepts.What are the impacts on MDI topics from physics options (Giga-Z, polarized e+, simultaneous running of 2 IRs, gamma-gamma, e-e-). What are the different impacts from the Detector concepts being studied (SiD, Large and HUGE gaseous detectors) e.g. B-field, L*, IR apertures.